ul li {
    float: left;
    padding: 5px;
}
.cm-header .cm-header-icon {
  width: 44px;
  height: 44px;
  display: inline-block;
  text-align: center;
}

.icon-back::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  vertical-align: middle;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #fff;
  -webkit-transform: rotate(45deg);
  transform: rotate(45deg);
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}